Relationship between Crystal Shape, Photoluminescence, and Local Structure in SrTiO3 Synthesized by Microwave-Assisted Hydrothermal Method

被引：48

作者：

da Silva, Luis F. ^{[1
]}

Avansi, Waldir ^{[2
]}

Moreira, Mario L. ^{[2
]}

Mesquita, Alexandre ^{[3
]}

Maia, Lauro J. Q. ^{[4
]}

Andres, Juan ^{[5
]}

Longo, Elson ^{[2
]}

Mastelaro, Valmor R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazil

[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

[4] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[5] Univ Jaume 1, Dept Quim Fis & Analit, Castellon de La Plana 12071, Spain

来源：

JOURNAL OF NANOMATERIALS | 2012年 / 2012卷

基金：

巴西圣保罗研究基金会;

关键词：

RAY-ABSORPTION SPECTRA; LUMINESCENCE PROPERTIES; DECAOCTAHEDRON SHAPE; GROWTH; TEMPERATURE; DISORDER; TITANATE; POWDERS; SPHERES;

D O I：

10.1155/2012/890397

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper describes the effect of using different titanium precursors on the synthesis and physical properties of SrTiO3 powders obtained by microwave-assisted hydrothermal method. X-ray diffraction measurements, X-ray absorption near-edge structure (XANES) spectroscopy, field emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HRTEM) were carried out to investigate the structural and optical properties of the SrTiO3 spherical and cubelike-shaped particles. The appropriate choice of the titanium precursor allowed the control of morphological and photoluminescence (PL) properties of SrTiO3 compound. The PL emission was more intense in SrTiO3 samples composed of spherelike particles. This behavior was attributed to the existence of a lower amount of defects due to the uniformity of the spherical particles.

引用

页数：6

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